WSR 14-15-054 PROPOSED RULES BUILDING CODE COUNCIL [Filed July 11, 2014, 4:22 p.m.]
Original Notice.
Preproposal statement of inquiry was filed as WSR 14-06-033.
Title of Rule and Other Identifying Information: Amendments to chapter 51-11C WAC, the Washington State Energy Code, Commercial provisions.
Hearing Location(s): Fire Department Training Center, 1618 South Rebecca Street, Spokane, WA, on September 12, 2014, at 10 a.m.; and at DES Presentation Room, 1500 Jefferson S.E., Olympia, WA 98504, on October 10, 2014, at 10 a.m.
Date of Intended Adoption: November 14, 2014.
Submit Written Comments to: Ray Allshouse, P.O. Box 41449, Olympia, WA 98504-1449, e-mail sbcc@ga,wa,gov [sbcc@ga.wa.gov], fax (360) 586-9088, by October 24, 2014.
Assistance for Persons with Disabilities: Contact Peggy Bryden by September 2, 2014, (360) 407-9280.
Purpose of the Proposal and Its Anticipated Effects, Including Any Changes in Existing Rules: Makes editorial changes to the following sections of the residential energy portion of the Washington State Energy Code:
Section C202.18-R is amended to modify the definitions of refrigerated warehouse cooler and freezer to provide greater clarity on when a warehouse is refrigerated versus just conditioned.
Section C402.4.5.2 is amended to correct language on requirements for maximum damper leakage. The initial model code language contained an error in the coordination of class type and leakage rates for motorized dampers. The language is corrected to require the less stringent of the two references. An exemption was also added to allow for off the shelf packaged equipment for return air dampers.
Section C403.2.4.4 is modified to direct the user to additional requirements for dampers within the envelope section of the code.
Statutory Authority for Adoption: RCW 19.27A.025, 19.27A.045.
Rule is not necessitated by federal law, federal or state court decision.
Name of Proponent: State building code council, governmental.
Name of Agency Personnel Responsible for Drafting and Implementation: Krista Braaksma, P.O. Box 41011, Olympia, WA 98504-1449, (360) 407-9278; and Enforcement: Local jurisdictions.
No small business economic impact statement has been prepared under chapter 19.85 RCW. The agency has analyzed the proposed rules and concludes that they do not impose additional costs to affected small businesses and could result in reduced costs.
A cost-benefit analysis is not required under RCW 34.05.328. The state building code council is not a listed agency under RCW 34.05.328 (5)(a)(i).
June 13, 2014
C. Ray Allshouse
Council Chair
AMENDATORY SECTION (Amending WSR 13-04-056, filed 2/1/13, effective 7/1/13)
WAC 51-11C-20218 Section C202.18—R.
READILY ACCESSIBLE. Capable of being reached quickly for operation, renewal or inspection without requiring those to whom ready access is requisite to climb over or remove obstacles or to resort to portable ladders or access equipment (see "Accessible").
REFRIGERATED WAREHOUSE COOLER. An enclosed storage space ((capable of being refrigerated to temperatures above 32°F that can be walked into and)) that has a total chilled storage area of 3,000 ft2 or greater and is designed to maintain a temperature of greater than 32°F but less than 55°F.
REFRIGERATED WAREHOUSE FREEZER. An enclosed storage space ((capable of being refrigerated to temperatures at or below 32°F that can be walked into and)) that has a total chilled storage area of 3,000 ft2 or greater and is designed to maintain a temperature at or below 32°F.
REPAIR. The reconstruction or renewal of any part of an existing building.
RESIDENTIAL BUILDING. For this code, includes detached one- and two-family dwellings and multiple single-family dwellings (townhouses) as well as Group R-2, R-3 and R-4 buildings three stories or less in height above grade plane.
ROOF ASSEMBLY. A system designed to provide weather protection and resistance to design loads. The system consists of a roof covering and roof deck or a single component serving as both the roof covering and the roof deck. A roof assembly includes the roof covering, underlayment, roof deck, insulation, vapor retarder and interior finish.
-VALUE (THERMAL RESISTANCE).r The inverse of the time rate of heat flow through a body from one of its bounding surfaces to the other surface for a unit temperature difference between the two surfaces, under steady state conditions, per unit area (h • ft2 • °F/Btu) [(m2 • K)/W].
Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency. Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency and appear in the Register pursuant to the requirements of RCW 34.08.040. AMENDATORY SECTION (Amending WSR 13-04-056, filed 2/1/13, effective 7/1/13)
WAC 51-11C-40245 Section C402.4.5—Air intakes, exhaust openings, stairways and shafts.
C402.4.5 Air intakes, exhaust openings, stairways and shafts. Stairway enclosures and elevator shaft vents and other outdoor air intakes and exhaust openings integral to the building envelope shall be provided with dampers in accordance with Sections C402.4.5.1 and C402.4.5.2.
C402.4.5.1 Stairway and shaft vents. Stairway and shaft vents shall be provided with Class I motorized dampers with a maximum leakage rate of 4 cfm/ft2 (20.3 L/s • m2) at 1.0 inch water gauge (w.g.) (249 Pa) when tested in accordance with AMCA 500D.
Stairway and shaft vent dampers shall be installed with controls so that they are capable of automatically opening upon:
1. The activation of any fire alarm initiating device of the building's fire alarm system; or
2. The interruption of power to the damper.
C402.4.5.2 Outdoor air intakes ((and)), exhaust((s)) outlets, relief outlets, and return openings. Outdoor air supply, exhaust openings and relief outlets shall be provided with Class I((A)) motorized dampers which close automatically when the system is off. ((Return air dampers shall be equipped with motorized dampers.)) Dampers shall have a maximum leakage rate of 4 cfm/ft2 (20.3 L/s • m2) at 1.0 inch water gauge (w.g.) (249 Pa) when tested in accordance with AMCA 500D.
Return air openings used for airside economizer operation shall be equipped with Class I motorized dampers. Dampers shall have a maximum leakage rate of 4 cfm/ft2 (20.3 L/s • m2) at 1.0 inch water gauge (w.g.) (249 Pa) when tested in accordance with AMCA 500D.
See also section C403.2.4.4 for additional requirements from damper shut-off controls.
AMENDATORY SECTION (Amending WSR 13-04-056, filed 2/1/13, effective 7/1/13)
WAC 51-11C-403244 Section C403.2.4.4—Shutoff damper controls.
C403.2.4.4 Shutoff damper controls. Both outdoor air supply and exhaust ducts shall be equipped with motorized dampers that will automatically shut when the systems or spaces served are not in use or during building warm-up, cooldown, and setback.
See also section C402.4.5 for additional damper requirements and maximum leakage rates.
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